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Fair Value - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Financial assets: |  |
Cash and money market instruments | $ 169,112 | $ 146,466
Investment securities (1) | 1,457,595 | 1,514,811
Mortgage loans held for sale | 4,148 | 10,413
Impaired loans carried at fair value | 3,574 | 5,983
Derivative Asset | 94 | 124
Other loans, net | 5,247,021 | 5,161,919
Loans receivable, net | 5,254,837 | 5,178,439
Financial liabilities: |  |
Noninterest bearing checking accounts | 1,633,941 | 1,523,417
Interest bearing transaction accounts | 1,260,095 | 1,174,448
Savings accounts | 1,888,545 | 1,704,920
Time Deposits, Fair Value | 1,035,093 | 1,122,598
Other | 1,269 | 1,301
Total deposits | 5,818,943 | 5,526,684
Short-term borrowings | 391,289 | 394,795
Long-term debt | 504,503 | 712,958
Subordinated debentures/notes | 13,370 | 40,903
Fair value swap |  |
Derivative financial instruments: |  |
Swaps, fair value | 226 | 226
Level 1 |  |
Financial assets: |  |
Cash and money market instruments | 169,112 | 146,466
Investment securities (1) | 1,518 | 2,644
Derivative Asset | 0 | 0
Loans receivable, net | 0 | 0
Financial liabilities: |  |
Noninterest bearing checking accounts | 1,633,941 | 1,523,417
Interest bearing transaction accounts | 1,260,095 | 1,174,448
Savings accounts | 1,888,545 | 1,704,920
Other | 1,269 | 1,301
Total deposits | 4,783,850 | 4,404,086
Level 2 |  |
Financial assets: |  |
Investment securities (1) | 1,455,660 | 1,511,377
Mortgage loans held for sale | 4,148 | 10,413
Derivative Asset | 94 | 124
Loans receivable, net | 4,242 | 10,537
Financial liabilities: |  |
Time Deposits, Fair Value | 1,035,093 | 1,122,598
Total deposits | 1,035,093 | 1,122,598
Short-term borrowings | 391,289 | 394,795
Long-term debt | 504,503 | 712,958
Subordinated debentures/notes | 13,370 | 40,903
Level 3 |  |
Financial assets: |  |
Investment securities (1) | 417 | 790
Impaired loans carried at fair value | 3,574 | 5,983
Derivative Asset | 0 | 0
Other loans, net | 5,247,021 | 5,161,919
Loans receivable, net | 5,250,595 | 5,167,902
Financial liabilities: |  |
Total deposits | 0 | 0
Level 3 | Fair value swap |  |
Derivative financial instruments: |  |
Swaps, fair value | 226 | 226
Available-for-sale Securities [Member] |  |
Financial assets: |  |
Accrued interest receivable | 5,505 | 3,849
Available-for-sale Securities [Member] | Level 2 |  |
Financial assets: |  |
Accrued interest receivable | 5,505 | 3,849
Loans |  |
Financial assets: |  |
Accrued interest receivable | 16,659 | 14,973
Loans | Level 3 |  |
Financial assets: |  |
Accrued interest receivable | 16,659 | 14,973
Deposits |  |
Financial liabilities: |  |
Accrued interest payable | 1,211 | 900
Deposits | Level 1 |  |
Financial liabilities: |  |
Accrued interest payable | 77 | 82
Deposits | Level 2 |  |
Financial liabilities: |  |
Accrued interest payable | 1,134 | 818
Borrowings |  |
Financial liabilities: |  |
Accrued interest payable | 1,067 | 1,251
Borrowings | Level 1 |  |
Financial liabilities: |  |
Accrued interest payable | 11 | 1
Borrowings | Level 2 |  |
Financial liabilities: |  |
Accrued interest payable | 1,056 | 1,250
Reported Value Measurement [Member] |  |
Financial assets: |  |
Cash and money market instruments | 169,112 | 146,466
Investment securities (1) | 1,451,013 | 1,517,972
Mortgage loans held for sale | 4,148 | 10,413
Impaired loans carried at fair value | 3,574 | 5,983
Derivative Asset | 94 | 124
Other loans, net | 5,314,679 | 5,204,713
Loans receivable, net | 5,322,495 | 5,221,233
Financial liabilities: |  |
Noninterest bearing checking accounts | 1,633,941 | 1,523,417
Interest bearing transaction accounts | 1,260,095 | 1,174,448
Savings accounts | 1,888,545 | 1,704,920
Time Deposits, Fair Value | 1,033,476 | 1,117,870
Other | 1,269 | 1,301
Total deposits | 5,817,326 | 5,521,956
Short-term borrowings | 391,289 | 394,795
Long-term debt | 500,000 | 694,281
Subordinated debentures/notes | 15,000 | 45,000
Reported Value Measurement [Member] | Fair value swap |  |
Derivative financial instruments: |  |
Swaps, fair value | 226 | 226
Reported Value Measurement [Member] | Available-for-sale Securities [Member] |  |
Financial assets: |  |
Accrued interest receivable | 5,505 | 3,849
Reported Value Measurement [Member] | Loans |  |
Financial assets: |  |
Accrued interest receivable | 16,659 | 14,973
Reported Value Measurement [Member] | Deposits |  |
Financial liabilities: |  |
Accrued interest payable | 1,211 | 900
Reported Value Measurement [Member] | Borrowings |  |
Financial liabilities: |  |
Accrued interest payable | $ 1,067 | $ 1,251

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Definition Fair value of subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=63488139&loc=d3e12121-115841 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12.Column C.3,4) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14.Column E.2,3) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-12C.Column C.7) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 5 -Subparagraph (SX 210.12-13.Column C.6) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611282-123010 + Details
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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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